Kilowatts to Amps Calculator
Convert power in kilowatts (kW) to current in amps (A).
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Results
DC kilowatts to amps calculation
The current I in amps (A) is equal to 1000 times the power P in kilowatts (kW), divided by the voltage V in volts (V):
I(A) = 1000 × P(kW) / V(V)
AC single phase kilowatts to amps calculation
The phase current I in amps (A) is equal to 1000 times the power P in kilowatts (kW), divided by the power factor PF times the RMS voltage V in volts (V):
I(A) = 1000 × P(kW) / (PF × V(V))
AC three-phase kilowatts to amps calculation
Calculation with line-to-line voltage
The phase current I in amps (A) is equal to 1000 times the power P in kilowatts (kW), divided by a square root of 3 times the power factor PF times the line-to-line RMS voltage VL-L in volts (V):
I(A) = 1000 × P(kW) / (√3 × PF × VL-L(V))
Calculation with a line to neutral voltage
The phase current I in amps (A) is equal to 1000 times the power P in kilowatts (kW), divided by 3 times the power factor PF times the line to neutral RMS voltage VL-N in volts (V):
I(A) = 1000 × P(kW) / (3 × PF × VL-N(V))
Typical power factor values
| Device | Typical power factor |
|---|---|
| Resistive load | 1 |
| Fluorescent lamp | 0.95 |
| Incandescent lamp | 1 |
| Induction motor full load | 0.85 |
| Induction motor no load | 0.35 |
| Resistive oven | 1 |
| Synchronous motor | 0.9 |
Comprehensive Guide: Kilowatts to Amps Conversion
Converting electrical power in kilowatts (kW) to current in amps (A) is one of the most common calculations performed by electricians and engineers. Whether you are sizing a circuit breaker or determining the load of a new appliance, the Kilowatts to Amps Calculator provides instant, accurate results across DC and AC systems.
The Relationship Between Power, Current, and Voltage
In any electrical system, power is the product of voltage and current. Kilowatts (kW) represents the total power consumed, Volts (V) represents the electrical pressure, and Amps (A) represents the flow of electrical charge. By rearranging Ohm's Law and Watt's Law, you can easily find the current if you know the power and the voltage.
Understanding the Formulas
Our calculator dynamically applies the correct mathematical formula based on your selected electrical system:
- Direct Current (DC): The calculation is straightforward: divide the power (in watts) by the voltage. I = 1000 × P / V
- Alternating Current (AC) Single-Phase: AC circuits often have inductive or capacitive loads, meaning the voltage and current are out of phase. This requires factoring in the Power Factor (PF). I = 1000 × P / (PF × V)
- Alternating Current (AC) Three-Phase: Industrial environments typically use three-phase power for efficiency. The formula introduces the square root of 3 (for line-to-line) to account for the phase difference.
Why This Matters
Accurately calculating amperage is critical for safety. If a circuit draws more amps than it is rated for, wires can overheat, potentially causing fires. This tool ensures you select the appropriately sized wires and circuit breakers for your specific equipment load.